Large Induction Coil by Siemens & Halske, c. 1910

'Large Induction Coil by Siemens & Halske, c. 1910 For "Gesellschaft für drahtlose Telegraphie", type RF ms2, 17 ¾ x 9 7/8 x 11 2/5 in. 'Großer Funkeninduktor von Siemens & Halske, um 1910 Für "Ge

Large Induction Coil According to Ruhmkorff, c. 1910 Manufactured by Siemens & Halske. For spark length up to 6 in., with commutator, length of the coil 15 2/5 in., overall size 30 x 10 5/8 x 16 ½ in

Large Induction Coil According to Ruhmkorff, c. 1910 Manufactured by AEG, Berlin. For spark length up to 10 in., overall size 34 x 10 5/8 x 18 ¼ in., good original condition. Großer Funkeninduktor n

Large Induction Coil with Mercury Interrupter, c. 1910 Coil length 19 5/8 in., spark length up to 9 7/8 in., on wood base, size 32 1/3 x 14 1/5 in. An impressive exhibition item! Großer Funkenindukto

Large 16-Inch Induction Coil According to Ruhmkorff, c. 1910 No. 997, manufacturer: "Watson & Sons (Electro-Medical) Ltd.", London, for spark lengths up to 16 in., overall size 34 x 13 1/3 x 18 ¼ in.

Siemens & Halske Patent Telephone, c. 1910 No. 278216, polished walnut case, carbon microphone with speaking horn, adjustable receiver by Siemens & Halske, large three-part crank inductor. Patent-Tele

A Very Large Induction Coil, English, c.1900, unsigned the secondary coil with vulcanite separator and supported on wooden uprights, on large French polished mahogany base with brass lacquered termina

A Large Induction Coil, English, c.1890, with plaque for 'F. E. BECKER & CO 33-37 HATTON WALL LONDON', on a large French polished mahogany plinth base with Ruhmkorff switch large adjustable interrupte

Large "Nivoc" Laboratory Induction Coil, c. 1930 W. and J. George and Becker Limited, Birmingham and London. Coil length 13 in., length of the spark gap approx. 5 in., with Ruhmkorff's commutator, on

Very Large Induction Coil by Max Kohl, c. 1915 Max Kohl, Chemnitz, Germany. Coil length 12 ¼ in., length of the spark gap approx. 6 in., with mercury and platinum interrupters and Ruhmkorff's commuta

Large Induction Coil According to Ruhmkorff, c. 1900 No. 7934, manufactured by Fr. Klingelfuss & Co., Basel. Coil length 16 ½ in., Ø 8 ¾ in., on walnut base. Großer Funkeninduktor nach Ruhmkorff,

2 Early Electric Motors, c. 1910 Unmarked, large coils, belt pulleys, on wooden bases, heights 9 ½ in. and 7 in. 2 frühe Elektromotoren, um 1910 Jeweils unbezeichnet, große Spulen, Riemenscheiben,

Scientific Devices and Measuring Instruments 1) Mirror galvanometer, c. 1918, Siemens & Halske, moving coil system for general laboratory purposes, removable top, height 15 in. - 2) Tangent bussole, c

German Wall Telephone Model M1903 Manufacturer "P.Z. & Co.", no. 1143, moveable mouthpiece, Siemens & Halske receiver, 3-part induction coil, wood case. Deutsches Wandtelephon Modell M1903 Herstell

Wall Telephone by L.M. Ericsson, c. 1910 Stockholm, 3-part induction coil, double bell, lightning protection, walnut case, writing desk, tin battery cover. Wandtelephon von L.M. Ericsson, um 1910 Stoc

French Experiment Box for Demonstrating Electricity, c. 1910 Electricité, with 2 chromic acid cell batteries, induction coil, 2 Geissler tubes, magneto-electro motor with mount for tubes, 2 lamps

Telephone Switchboard, c. 1910 With plugs and flaps, five-part induction coil, crank, handset with speaking horn, and mahogany case, height 22 ½ in. Telephonzentrale, um 1910 Mit Stöpseln und Kl

Resistance Bridges and Wattmeter, c. 1910 1) Resistance bridge with rheostat by "Hartmann & Braun", no. 667, with earphone. - 2) Precision wattmeter by "Siemens & Halske". - 3) Measuring bridge, 3 ro

English, c.1900, unsigned the secondary coil with vulcanite separator and supported on wooden uprights, on large French polished mahogany base with brass lacquered terminals, tall upright insulators t

Eight Precision Instruments, c. 1890-1910 1) Crank rheostat, Siemens & Halske, six changeable decade resistors, manganese wire-winding, in mahogany case, 14 ½ x 9 in. - 2) Crank resistor, Sieme

2 Siemens & Halske Telephones 1) Wall-mounted telephone, c. 1920, in-line set for 25 extensions, large striking ring number disc, single bell, black-lacquered metal case with nickel-plated dial. - And

2 German Wall Phones 1) Siemens & Halske, Berlin, simplified design telephone station, c. 1896, no. 92028, carbon bag microphone, large can receiver, two-part crank inductor, double bell, polished wal

Measuring Bridge by Siemens & Halske, c. 1890 Thomson measuring bridge with sliding wire, for resistance measurement from 0,1 to 0,000001 ohms, upper part with circular plug rheostat, with 10 plugs an

Telegraph Station by Siemens & Halske, c. 1890 No. 55363, ink-writer, original lacquered brass, with relay and Morse key, drawer with paper strip, on original telegraph station table, size 35 &#